Functional resin for paint and manufacture method thereof

A technology of functional resins and coatings, applied in the direction of polyester coatings, coatings, etc., can solve the problems of inconvenient centralized incineration of organic solvents, prolong the construction period, increase manufacturing costs, etc., and achieve good economy, good workability, and viscosity low effect

Active Publication Date: 2008-08-20
ZHEJIANG TIANNU GROUP PAINT MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantages of the coating made of the above resins are: 1. It is difficult to apply continuous coating on the raw steel plate, and to ensure the quality control requirements for the surface treatment and coating of the steel plate. reduce environmental pollution
2. The steel plate must be made into finished products or parts before painting, which prolongs the construction period and increases the manufacturing cost
3. It is difficult to dry quickly at low temperature (20 seconds / below 190°C plate temperature) to achieve high efficiency and energy saving

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Embodiment 1 (energy resin):

[0024] In a reactor equipped with stirrer, condenser, heater and a packed column, weigh 60g of adipic acid, 150g of isophthalic acid, 110g of Pripol 1009, 30g of maleic anhydride, 82g of propylene glycol, 145g of BEPD, 35g of trimethylolpropane and 0.7g of monobutyltin oxide are heated so that the temperature of the packed column does not exceed 100°C. Carry out at (150°C-160°C) 3h, (160°C-170°C) / 2h, (170°C-180°C) / 2h, (180°C-200°C) / 2h speed, add reflux xylene at 200°C , then heat up to 220°C at a rate of 2 hours and keep it warm. When the acid value is lower than 5mgKOH / g, weigh in 5g of trimellitic anhydride when it cools to 200°C, and heat again. The maximum temperature does not exceed 220°C. When the acid value reaches 8mgKOH / g At g, weigh 340g Solvesso 100 and 30g Santosol DME-1 for dilution. The obtained functional resin has a solid content of 60%, a viscosity of 90KU and a hydroxyl value of 65.

Embodiment 2

[0025] Embodiment 2 (energy resin):

[0026] In a reactor equipped with a stirrer, condenser, heater and a packed column, weigh 50g of adipic acid, 63g of isophthalic acid, 105g of phthalic anhydride, 114g of Pripol 1009, 24g of maleic anhydride , 215g of NPG, 34g of trimethylolpropane, 0.6g of dibutyltin dilaurate and heated so that the temperature of the packed column does not exceed 100°C. Heat up at the speed of (150°C-160°C) / 3h, (160-170°C) / 2h, (170°C-180°C) / 2h, (180°C-200°C) / 2h, add 15g reflux at 200°C Xylene, then heat up to 220°C at a speed of 2 hours and keep it warm. When the acid value is lower than 5mgKOH / g, weigh 10g of trimellitic anhydride when it is cooled to 200°C, and heat again. The maximum temperature does not exceed 220°C. When the acid value reaches 10mgKOH / g, weigh in 340g Solvesso 100 and 30gDBE for dilution. The obtained functional resin has a solid content of 60%, a viscosity of 90KU and a hydroxyl value of 60.

Embodiment 3

[0027] Embodiment 3 (energy resin):

[0028] In a reactor equipped with a stirrer, condenser, heater and a packed column, weigh 40g adipic acid, 180g terephthalic acid, 105g phthalic anhydride, 180g diethylene glycol, 60g MPD, 23g trimethylolpropane, 34g E03 epoxy resin, 0.6g monobutyltin oxide chloride are heated so that the temperature of the packed column does not exceed 100°C. Carry out at the speed of (150°C-160°C) / 3h, (160°C-170°C) / 2h, (170°C-180°C) / 2h, (180°C-200°C) / 2h, add 10g reflux at 200°C Xylene, heat up to 220°C at a rate of 2 hours and keep it warm. When the acid value is lower than 5mgKOH / g, weigh 15g of trimellitic anhydride when it is cooled to 200°C, and heat again. The maximum temperature does not exceed 220°C. When the acid value reaches 15mgKOH / g, weigh in 280g Solvesso 100, 50g cyclohexanone and 25g butanol for dilution. The obtained functional resin has a solid content of 55%, a viscosity of 95KU and a hydroxyl value of 55.

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PUM

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Abstract

The invention discloses a functional coating resin which consists of 12-16 portions of bifunctional alcohol, 2-8 portions of multifunctional alcohol, 18-25 portions of bifunctional acid, 8-15 portions of bifunctional anhydride, 0.5-4.5 portions of multifunctional anhydride, 0.03-0.1 portion of catalyst, 24-30 portions of high boiling aromatic solvent and 3-6 portions of mixed ester. The preparation method of the functional coating resin is carried out by the steps according to the proportion: 12-16 portions of bifunctional alcohol, 2-8 portions of multifunctional alcohol, 18-25 portions of bifunctional acid, 8-15 portions of bifunctional anhydride, 0.5-4.5 portions of multifunctional anhydride, 0.3-0.1 portion of catalyst, the melting esterifiction, dehydration, high temperature polymerization are carried out by a gradual temperature-gradient method for 4 hours under 150-160 DEG C, 3 hours under 160-180 DEG C, 2 hours under 180-200 DEG C and 2 hours under 200-220 DEG C, reacting another 2-4 hours under 200-225 DEG C,24-30 portions of high boiling aromatic solvent is added and 3-6 portions of ester is mixed for dilution when the control requirements are achieved, thus obtaining the finished product. The functional coating resin is characterized by good workability, marresistance, thermal resistance and aging resistance, the product coating produced by matching the functional resin with pigments e.g. rutile titanium dioxide powder and phthalocyanine, amino resin and aids has excellent weatherability and mechanism character.

Description

Technical field: [0001] The invention relates to a functional resin, in particular to a functional resin for coatings and a preparation method thereof. Background technique: [0002] The raw materials of coatings are mainly composed of five types of materials: resins, pigments, fillers, additives, and solvents. [0003] Resin for coatings, that is, functional resins, is the core component of coatings. At present, commonly used coatings in China include phenolic resins, alkyd resins, acrylic resins, epoxy resins, polyester resins, chlorinated rubber, and fluororesins. And all kinds of organically modified synthetic resins. [0004] The above types of resins have their own strengths, but resins that can simultaneously meet the requirements of construction, mechanical properties, processability, weather resistance, and low-temperature and quick-drying are rare. The disadvantages of the coating made of the above resins are: 1. It is difficult to apply continuous coating on the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/12C08G63/81C08G63/85C09D167/00
Inventor 姚珄铭
Owner ZHEJIANG TIANNU GROUP PAINT MFG
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